After 18 years of struggles, the Golden Gate Bridge opened on May 27, 1937.
Begun during the Civil War, the transcontinental railroad employed 20,000 men, mostly immigrants, who built the iron road with their bare hands.
A personal story of one family's dramatic effort to hold onto their family farm in Iowa as massive foreclosures sweep the nation in the 1990s.
The U.S. and the Soviet Union race to build the hydrogen bomb during the Cold War, thus beginning the nuclear arms race.
The effort of pioneering researchers to conceive babies through in vitro fertilization.
Politics, culture, race relations, and technology in a year of change.
When two passenger ships collide off Nantucket in 1909, 1,500 people rely on 26-year-old Jack Binns to operate a new technology - wireless telegraphy - to save them all.
Equipment failure, human error and bad luck led to the country's worst nuclear accident in 1979.